diff options
Diffstat (limited to 'util/x86emu/yabel/biosemu.c')
| -rw-r--r-- | util/x86emu/yabel/biosemu.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/util/x86emu/yabel/biosemu.c b/util/x86emu/yabel/biosemu.c index df202814a4..09a98b50b6 100644 --- a/util/x86emu/yabel/biosemu.c +++ b/util/x86emu/yabel/biosemu.c @@ -86,10 +86,15 @@ biosemu(u8 *biosmem, u32 biosmem_size, struct device * dev, unsigned long rom_ad // in case we jump somewhere unexpected, or execution is finished, // fill the biosmem with hlt instructions (0xf4) - memset(biosmem, 0xf4, biosmem_size); + // But we have to be careful: If biosmem is 0x00000000 we're running + // in the lower 1MB and we must not wipe memory like that. + if (biosmem) { + DEBUG_PRINTF("Clearing biosmem\n"); + memset(biosmem, 0xf4, biosmem_size); + } + + X86EMU_setMemBase(biosmem, biosmem_size); - M.mem_base = (long) biosmem; - M.mem_size = biosmem_size; DEBUG_PRINTF("membase set: %08x, size: %08x\n", (int) M.mem_base, (int) M.mem_size); |